Astronaut Mark Uri Is Space-Traveling from Planet X to Planet

question 48

Multiple Choice

Astronaut Mark Uri is space-traveling from planet X to planet Y at a speed of 0.65c relative to the planets, which are at rest relative to each other. When he is precisely halfway between the planets, a distance of 1.0 light-hour from each one as measured in the planet frame, nuclear devices are detonated on both planets. The explosions are simultaneous in Mark's frame. What is the difference in the time of arrival of the flashes from the explosions as observed by Mark?

• A) 0 min
• B) 180 min
• C) 90 min
• D) 360 min
• E) 113 min

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Definitions:

Net Income

The total profit of a company after all expenses and taxes have been deducted from total revenue.

Common Stock

Shares that constitute ownership in a corporation, providing voting rights and entitling shareholders to a portion of the company’s profits through dividends.

Cash Dividend

A payment made by a company to its shareholders, usually in cash, out of its profits or reserves.

Bond Payable

A long-term debt instrument issued by corporations and governments, promising to pay the bondholder a specified sum of money at future dates.